//
// chat_message.hpp
// ~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//

#ifndef CHAT_MESSAGE_HPP
#define CHAT_MESSAGE_HPP

#include <cstdio>
#include <cstdlib>
#include <cstring>

class chat_message
{
public:
  enum { header_length = 4 };
  enum { max_body_length = 512 };

  const static std::string punch_header;

  chat_message()
    : body_length_(0)
  {
  }

  const char* data() const
  {
    return data_;
  }

  char* data()
  {
    return data_;
  }

  std::size_t length() const
  {
    return header_length + body_length_;
  }

  const char* body() const
  {
    return data_ + header_length;
  }

  char* body()
  {
    return data_ + header_length;
  }

  std::size_t body_length() const
  {
    return body_length_;
  }

  void body_length(std::size_t new_length)
  {
    body_length_ = new_length;
    if (body_length_ > max_body_length)
      body_length_ = max_body_length;
  }

  bool decode_header()
  {
    if(data_[0] == 0x20 && data_[1] == 0x20 && data_[2] == 0x20)
    {
        body_length_ = data_[3];
        return true;
    }
    return false;
  }

  void encode_header()
  {
    data_[0] =0x20;
    data_[1] =0x20;
    data_[2] =0x20;
    data_[3] =body_length_;
  }

private:
  char data_[header_length + max_body_length];
  std::size_t body_length_;
};



#endif // CHAT_MESSAGE_HPP
